OMG, have you visited chess.com lately and actually looked at the home page? I usually rush to log in (duh!) but the "mobile chess" box on the front piqued my interest. I currently use a hand-me-down Razr, with no data capabilities...but with a chess application, the iPhone is looking a lot better to me these days! I could play chess on the go! While on hold with customer service! OMG in the bathroom!
Bonus feature for the MMORPGers in the audience--Final Fantasy and Final Fantasy II are now available for the iPhone as well!